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128 lines
2.7 KiB
128 lines
2.7 KiB
11 years ago
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/*
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* Copyright 2008-2012 NVIDIA Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*! \file extrema.h
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* \brief Sequential implementations of extrema functions.
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*/
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#pragma once
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#include <thrust/detail/config.h>
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#include <thrust/pair.h>
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#include <thrust/detail/function.h>
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namespace thrust
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{
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namespace system
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{
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namespace detail
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{
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namespace internal
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{
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namespace scalar
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{
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template <typename ForwardIterator,
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typename BinaryPredicate>
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ForwardIterator min_element(ForwardIterator first,
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ForwardIterator last,
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BinaryPredicate comp)
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{
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// wrap comp
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thrust::detail::host_function<
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BinaryPredicate,
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bool
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> wrapped_comp(comp);
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ForwardIterator imin = first;
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for (; first != last; first++)
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{
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if (wrapped_comp(*first, *imin))
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{
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imin = first;
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}
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}
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return imin;
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}
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template <typename ForwardIterator,
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typename BinaryPredicate>
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ForwardIterator max_element(ForwardIterator first,
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ForwardIterator last,
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BinaryPredicate comp)
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{
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// wrap comp
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thrust::detail::host_function<
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BinaryPredicate,
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bool
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> wrapped_comp(comp);
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ForwardIterator imax = first;
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for (; first != last; first++)
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{
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if (wrapped_comp(*imax, *first))
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{
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imax = first;
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}
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}
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return imax;
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}
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template <typename ForwardIterator,
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typename BinaryPredicate>
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thrust::pair<ForwardIterator,ForwardIterator> minmax_element(ForwardIterator first,
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ForwardIterator last,
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BinaryPredicate comp)
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{
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// wrap comp
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thrust::detail::host_function<
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BinaryPredicate,
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bool
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> wrapped_comp(comp);
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ForwardIterator imin = first;
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ForwardIterator imax = first;
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for (; first != last; first++)
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{
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if (wrapped_comp(*first, *imin))
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{
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imin = first;
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}
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if (wrapped_comp(*imax, *first))
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{
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imax = first;
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}
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}
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return thrust::make_pair(imin, imax);
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}
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} // end namespace scalar
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} // end namespace internal
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} // end namespace detail
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} // end namespace system
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} // end namespace thrust
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